Test if process is being debugged in Swift

Debug.swift

var isDebuggerAttached: Bool = {
    var kinfo = kinfo_proc()
    var mib : [Int32] = [CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid()]
    var size = MemoryLayout<kinfo_proc>.stride
    let result = sysctl(&mib, UInt32(mib.count), &kinfo, &size, nil, 0)
    assert(result == 0, "sysctl failed")
    return (kinfo.kp_proc.p_flag & P_TRACED) != 0
}()